US4228254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Functional group containing cyclic diolefin butyl rubbers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1978-08-07
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Granted: 1980-10-14
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Expires: 1998-08-07
Abstract
Abstract Isobutylene-based elastomers containing 3-15 mol percent enchained cyclic diolefin such as cyclopentadiene, and other comonomers such as isoprene, piperylene and butadiene to allow for chemical modification with anhydride, carboxy, hydroxy, etc. to produce a one package through cure system.
Inventors
- 👤 Kenneth W. Powers
- 👤 Robert Roper
- 👤 Martin L. Gorbaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:56
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A tack-free, air dryable, self-curing elastomeric terpolymer coating having a viscosity average molecular weight of about 15,000 to 80,000 which consists essentially of about 85 to 95 mol % isobutylene, about 5 to 9 mol % C 5 -C 12 cyclic diolefin and about 0.5 to 5 mol % conjugated diolefin represented by the formula ##STR6## where each R is are independently hydrogen or acyclic or alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms and wherein the terpolymer has attached thereto a functional group selected from the group consisting of anhydride, carboxy or hydroxy said coating being self-curing through surface oxidative crosslinking of said cyclic diolefin.
Claim 2
Dependent Claim
108 words
A tack-free, air dryable, self-curing elastomeric terpolymer coating having a viscosity average molecular weight of about 15,000 to 80,000 which consists essentially of about 85 to 95 mol % isobutylene, about 5 to 9 mol % C 5 -C 12 cyclic diolefin and about 0.5 to 5 mol % conjugated diolefin represented by the formula ##STR6## where each R is are independently hydrogen or acyclic or alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms and wherein the terpolymer has attached thereto a functional group selected from the group consisting of anhydride, carboxy or hydroxy said coating being self-curing through surface oxidative crosslinking of said cyclic diolefin.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein the cyclic diolefin is cyclopentadiene.
Claim 4
Dependent Claim
25 words
The composition of claim 1 wherein the cyclic diolefin is a mono or polyalkylated cyclopentadiene wherein each alkyl group contains less than 6 carbon atoms.
Claim 5
Dependent Claim
24 words
The composition of claim 2 wherein the mono or polyalkylated cyclopentadiene is selected from the group consisting of methyl cyclopentadiene, ethyl cyclopentadiene and 1,3-dimethylcyclopentadiene.
Claim 6
Dependent Claim
20 words
The composition of claim 1 wherein the conjugated diolefin is selected from the group consisting of isoprene, butadiene and piperylene.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the cyclic diolefin is cyclopentadiene.
Claim 8
Dependent Claim
11 words
The composition of claim 6 wherein the functional groups are anhydride.
References Cited (Backward Citations)
GB1062266A
Cited
FR1396141A
Cited
US3808177A
Cited
US3856763A
Cited
US3928297A
Cited
US4151343A
Cited
US3954912A
Cited
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US4145490A
Cited
US4153773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |